Display device

Abstract

A display device includes a circuit substrate, a light emitting diode, an encapsulation layer, a color conversion layer and a first optical structure. The light emitting diode is located on the circuit substrate. The encapsulation layer covers the light emitting diode. The color conversion layer overlaps the light emitting diode. The first optical structure overlaps the color conversion layer and is located between the encapsulation layer and the color conversion layer. The first optical structure includes first gaps periodically arranged with a first pitch on a first direction. The width of each first gap in the first direction is 1 micrometer to 10 micrometers. A refractive index of a material of the first optical structure is greater than a refractive index of a material of the encapsulation layer.

What is claimed is: 
     
       1. A display device, comprising:
 a circuit substrate; 
 a light emitting diode, located on the circuit substrate; 
 an encapsulate layer, covering the light emitting diode; 
 a color conversion layer, overlapping with the light emitting diode; and 
 a first optical structure having a thickness of 0.1 micrometer to 1 micrometer, overlapping with the color conversion layer and located between the encapsulate layer and the color conversion layer, wherein the encapsulate layer is located between the light emitting diode and the first optical structure, wherein the first optical structure comprises first gaps periodically arranged with a first pitch on a first direction, and a width of each first gap on the first direction is 1 micrometer to 10 micrometer, and a refraction index of a material the first optical structure is greater than a refraction index of a material of the encapsulate layer. 
 
     
     
       2. The display device of  claim 1 , further comprising
 a bank structure, surrounding the color conversion layer; 
 a black matrix, located between the circuit substrate and the bank structure, and surrounding the light emitting diode; 
 a second optical structure, located between the bank structure and the black matrix, wherein the second optical structure comprises second optical units periodically arranged with a second pitch on the first direction, and adjacent ones of the second optical units have a second gap. 
 
     
     
       3. The display device of  claim 2 , wherein a width of the second gap on the first direction is 1 micrometer to 10 micrometers. 
     
     
       4. The display device of  claim 2 , wherein the width of the first gaps on the first direction is greater than or equal to the width of the second gap on the first direction. 
     
     
       5. The display device of  claim 2 , wherein the encapsulate layer extends between the black matrix and the second optical structure. 
     
     
       6. The display device of  claim 1 , wherein the material of the first optical structure is a transparent material. 
     
     
       7. The display device of  claim 1 , wherein the first optical structure comprises first optical units arranged periodically, and the first gaps are located between adjacent ones of the first optical units, first surfaces of the first optical units facing the color conversion layer are flat surfaces, and second surfaces of the first optical units facing the circuit substrate are flat surfaces. 
     
     
       8. The display device of  claim 1 , wherein the encapsulate layer fills into the first gaps. 
     
     
       9. The display device of  claim 8 , wherein the encapsulate layer is in contact with the color conversion layer through the first gaps. 
     
     
       10. The display device of  claim 1 , further comprising
 a bank structure surrounding the color conversion layer, the encapsulate layer and the first optical structure, and the bank structure is in contact with the circuit substrate. 
 
     
     
       11. The display device of  claim 1 , further comprising:
 first color conversion particles, dispersed in the encapsulate layer, and wherein the color conversion layer comprises a base material and second color conversion particles dispersed in the base material. 
 
     
     
       12. The display device of  claim 1 , wherein the color conversion layer fills into the first gaps. 
     
     
       13. The display device of  claim 1 , wherein light emitted by the light emitting diode sequentially transmits through the encapsulate layer, the first gaps of the first optical structure and the color conversion layer. 
     
     
       14. A display device, comprising:
 a circuit substrate; 
 a light emitting diode, located on the circuit substrate; 
 an encapsulate layer, covering the light emitting diode; 
 a covering layer, located on the encapsulate layer; 
 a color conversion layer, overlapping the light emitting diode; and 
 a first optical structure having a thickness of 0.1 micrometer to 1 micrometer, overlapping the color conversion layer and located between the covering layer and the color conversion layer, wherein the encapsulate layer is located between the light emitting diode and the first optical structure, wherein the first optical structure comprises first gaps periodically arranged with a first pitch on a first direction, and a width of each first gap on the first direction is 1 micrometer to 10 micrometers, and a refractive index of a material of the first optical structure is greater than a refractive index of a material of the covering layer. 
 
     
     
       15. The display device of  claim 14 , further comprising
 a bank structure, surrounding the color conversion layer; 
 a black matrix, located between the circuit substrate and the bank structure and surrounding the light emitting diode; 
 a second optical structure, located between the bank structure and the black matrix, wherein the second optical structure comprises second gaps arranged periodically with a second pitch on the first direction. 
 
     
     
       16. The display device of  claim 15 , wherein the encapsulate layer extends between the black matrix and the second optical structure. 
     
     
       17. The display device of  claim 15 , wherein the covering layer fills into the first gaps, and the encapsulate layer fills into the second gaps. 
     
     
       18. The display device of  claim 17 , wherein the covering layer is in contact with the color conversion layer through the first gaps. 
     
     
       19. The display device of  claim 14 , wherein the first optical structure comprises first optical units arranged periodically, and the first gaps are located between adjacent ones of the first optical units, first surfaces of the first optical units facing the color conversion layer are flat surfaces, and second surfaces of the first optical units facing the circuit substrate are flat surfaces. 
     
     
       20. The display device of  claim 14 , wherein light emitted by the light emitting diode sequentially transmits through the encapsulate layer, the first gaps of the first optical structure and the color conversion layer.